E. Tamaševičiūtė, A. Tamaševičius, G. Mykolaitis, and S. Bumelienė, “Analogue Electrical Circuit for Simulation of the Duffing-Holmes Equation”, NAMC, vol. 13, no. 2, pp. 241–252, Apr. 2008, doi: 10.15388/NA.2008.13.2.14582.